/*
 * Copyright 2014-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.codecentric.boot.admin.server.domain.entities;

import de.codecentric.boot.admin.server.domain.values.BuildVersion;
import de.codecentric.boot.admin.server.domain.values.StatusInfo;

import java.time.Instant;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nullable;
import org.springframework.util.Assert;


@lombok.Data
public class Application {
    private final String name;
    @Nullable
    private final BuildVersion buildVersion;
    private final String status;
    private final Instant statusTimestamp;
    private final List<Instance> instances;

    @lombok.Builder(builderClassName = "Builder", toBuilder = true)
    private Application(String name,
                        @Nullable BuildVersion buildVersion,
                        @Nullable String status,
                        @Nullable Instant statusTimestamp,
                        List<Instance> instances) {
        Assert.notNull(name, "'name' must not be null");
        this.name = name;
        this.buildVersion = buildVersion;
        this.status = status != null ? status : StatusInfo.STATUS_UNKNOWN;
        this.statusTimestamp = statusTimestamp != null ? statusTimestamp : Instant.now();
        if (instances.isEmpty()) {
            this.instances = Collections.emptyList();
        } else {
            this.instances = new ArrayList<>(instances);

        }
    }

    public static class Builder {
        //Will be generated by lombok
    }

    public static Application.Builder create(String name) {
        return builder().name(name);
    }
}
